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A circular loop in the plane of the paper lies in a 0.80 T magnetic field pointing into the paper. If the loop's diameter changes from 21.0 to 7.8 in 0.19
A. what is the direction of the induced current?
B. What is the magnitude of the average induced emf?
C. If the coil resistance is 2.7 ohms , what is the average induced current?
Electrons are accelerated through a voltage difference of 145 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
Three 1.2 kg masses are located at the vertices of an equilateral triangle 88 rm cm on a side, connected by rods of negligible mass. Find out the rotational inertia of this object.
A rock is thrown vertically upward with a speed of 19.0m/s from the roof of a building that is 70.0m above the ground. What is the speed of the rock just before it strikes the ground
Water flows over a section of Niagara Falls at a rate of 1.07 × 106 kg/s and falls 40 m, How many 70 W bulbs can be lite with this power
A 2.8{\rm kg} block of wood sits on a table. A 3.0 {\rm g} bullet, fired horizontally at a speed of 370{\rm m/s} , What is the speed of the block immediately after the bullet exits
0.700-kg ball traveling horizontally on a frictionless surface approaches a very massive stone at 20.0 m/s perpendicular to wall, What is the magnitude of the change in momentum of the stone
questiontwo hockey players aaron and brunnhilde are pushing two pucks on a frictionless ice rink. the pucks are at
two small beads having positive charges 3q and q are fixed at the opposite ends of a horizontal, insulating rod, extending from the origin to the point x=d. a third small chatged bead is free to slide on the rod. at what position is the third bead..
A battery having an emf of 9.80 V delivers 109 mA when connected to a 60.0 load. Determine the internal resistance of the battery
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
A mass is stretched 4 centimeters from the equilibrium position of a spring. If the displacement is doubled, what can be concluded about the restoring force? A. It is halved. B. It is doubled. C. It stays the same. D. It is increased by 4. E. It i..
A star with an initial radius of 1.00 108 m and period of 30.0 days collapses suddenly to a radius of1.00 104 m. Find the period of rotation after collapse
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